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Sinorhizobium meliloti NtrX interacts with different regions of the visN promoter.
Acta Biochimica et Biophysica Sinica ( IF 3.7 ) Pub Date : 2020-06-08 , DOI: 10.1093/abbs/gmaa057
Shuang Zeng 1 , Shenghui Xing 1 , Fang An 1 , Xinwei Yang 1 , Junhui Yan 1 , Liangliang Yu 1 , Li Luo 1
Affiliation  

The bacterial flagellum is a motile organelle consisting of a transmembrane multi-protein apparatus composed of the flagellins, the flagellin export complex, and the basal body with motor proteins. Flagellum biosynthesis is regulated by a hierarchical system in Escherichia coli [1]. Different from E. coli, Sinorhizobium meliloti, as a plant-symbiotic soil bacterium, induces the formation of nitrogen-fixing root nodules on the host plant alfalfa when combined nitrogen is limited. Sinorhizobium meliloti contains a ‘flagellum regulon’ that consists of 41 genes, including 10 chemotaxis (che) genes, 4 motor (mot) genes, 15 flg, flh, and fli genes encoding the components of the protein export complex and the basal body, 4 flagellin (fla) genes, and 4 unknown genes [1]. Similar to E. coli, flagellum biosynthesis in S. meliloti depends on a hierarchical system that is composed of the Class IA regulators, VisN and VisR, the Class IB regulator, Rem, Class II FliM, MotABC, and Class III flagellin and chemotaxis proteins [2]. Recently, several other regulators involved in flagellum biosynthesis have been reported, including the tow-component regulatory system ExoS/ChvI with the suppressor ExoR and the LuxR regulator ExpR in S. meliloti [3,4].

中文翻译:

苜蓿中华根瘤菌NtrX与visN启动子的不同区域相互作用。

细菌鞭毛是一种运动细胞器,由跨膜多蛋白装置组成,该装置由鞭毛蛋白,鞭毛蛋白输出复合物和具有运动蛋白的基体组成。鞭毛的生物合成受大肠杆菌中的分级系统调控[1]。来自不同大肠杆菌苜蓿中华根瘤菌,作为植物共生土壤细菌,诱导对宿主植物苜蓿固氮根瘤形成时的结合氮是有限的。苜蓿中华根瘤菌含有一个“鞭毛调节基因”,它由41个基因组成,其中包括10个趋化性(che)基因,4个运动(mot)基因,15 flgflh,以及编码蛋白质输出复合物和基体成分的fli基因,4个鞭毛蛋白(fla)基因和4个未知基因[1]。与大肠杆菌相似,苜蓿链球菌的鞭毛生物合成取决于分级系统,该分级系统由IA类调节剂,VisN和VisR,IB类调节剂,Rem,II类FliM,MotABC和III类鞭毛蛋白和趋化蛋白组成。 [2]。最近,已经报道了涉及鞭毛生物合成的其他几种调节剂,包括带有抑制因子ExoR的丝束组分调节系统ExoS / ChvI和苜蓿链球菌中的LuxR调节剂ExpR [3,4]。
更新日期:2020-08-12
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